Poisson Formula

Poisson Formula is the kind of technique that looks too simple to respect and too useful to ignore.

Done properly, it feels almost disappointing — no drama, no transformation montage. Just a small improvement that stays. Small improvements that stay are the only big improvements there are.

The idea is simple, and like most simple ideas it is easy to nod at and hard to use. The nod is free. The use costs attention, every day, in small change.

Watch a master carpenter teach an apprentice. He does not lecture; he lets the boy hold the wrong end of the saw until the wood itself becomes the teacher.

Learning is the one wealth that survives every partition of fortune. Keep the name. Use the pause it gives you. That is the entire homework.